Stephen Dubner: I don't know if there's a strong evolutionary drive to feel the other side is evil. He says political leaders, political messaging have taken something that could have been channeled in a healthier way and turned it in a really dark direction. Coming up after the break, let's shed some light on that darkness with help from George Washington.
It’s fun to obsess over pop stars and racecar drivers — but is fandom making our politics even more toxic?